Centrifugal machine



W. BARTHOLOMEW.

CENTRIFUGAL MACHINE.

APPLICATION FILED SEPT. I5. 1920.

1,425,628. l Pa-tentedA11g.15,1922.

narran stares PATENT @FFitClL WILLIAK BARTHOLOME'W, OFCHUAGO, LLINOIS, ASSIGNOR TO TROY LAUNDRY MACHINERY CQ., LTD., 0F CEEICAGO, LLINOS, A CORPGRATEON OF NEW YORK.

CENTRIFUGAL IVIACHINE.

Application filed September 15, 1920.

To all 'LU/tom t may concern.'

Be it known that l, WILLIAM BARTHOLO- Mnw, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Centrifugal Machines, of which the following is a specification.

The present invention relates to centrifugal machines, and particularly to the connection between the rotary spindle and the basket or receptacle which is mounted thereon to be driven thereby.

It has been the practice to connect the upper end of the rotary cylinder in a centrifugal machine with the receptacle, for instance, the basket of a centrifugal extractor used for laundry purposes, by fitting the hub of the receptacle (generally a cast metal membe directly upon the` end of the spindle through the medium of a tapered tit, driving connection being` usually established through friction developed by forcing the. hub tightly upon its tapered seat. But sand or grit from sand holes or blow holes in the casting, released by machining' the bore, has sometimes found its way to the meeting surfaces of the hub and spindle which causes injury to the spindle and interferes with pulling the two members apart when it becomes necessary to remove the basket. liloreover, moisture sometimes enters between the meeting surfaces of the two members, developing rust. Again, it sometimes happens that the inertia or momentum of the basket causes slipping upon the spindle when the spindle,

rlhe present invention avoids the diflicul` ties above enumerated by providing between the huband the spindle a. packing sleeve of metal relatively softer than that of the spindle or hub, and of such nature that when the hub of the receptacle is driven on the spindle, the metal of the sleeve will conform to the surfaces and the space between the parts with such exactness as to produce a rustproof joint, sheath the tapered end of the spindle from any injury that might be imposed by sand or grit, and leave a relatively soft body in between the two me bers which can readily yield in the pulling operation and permit the parts to separate without in- Speccaton of Letters Patent.

Patented Aug. 15, 1922.

Serial No. 410,432.

jury to either of the more expensive members, and by thus restricting any injury resulting either from operation or disassembling to the relatively inexpensive sleeve, effect a. great saving in the use of this class of machines.

which the invention is particularly con-l cerned; and

Figure 3 is a detail view of the end of the spindle, its hub, and the pulling yoke used for disassembling the parts.

Il represents the spindle and 2 the basket mounted on the upper end of said spindle in a known type of centrifugal extractor. The member 2 is generally constructed with a cast metal hub 3, and the spindle l is provided with a tapered end to receive said hub.

According tothe present invention the bore of the huby B and the receiving end of the spindle il are tapered as heretofore, but the. bore is of sulliciently greater diameter than the end of the spindle to admit a packing sleeve 5, which lits the tapered end of the spindle and is itself provided with a tapered external surface fitting closely in the tapered bore of the hub Preferably the saine taper is used for the end l of the spindle l and the bore of the hub 8; that is to say, the bore is tapered parallelly with the end of the spindle but of materially larger diameter so as to leave a substantial space in which the sleeve 5 fits, and of such form that it will receive a sleeve of uniform thickness from end to end.

The sleeve is made of some soft metal, such, for instance, as babbitt, and when the hub 3 is forced upon the seat provided by this sleeve around the tapered end 4, the sleeve flows .imo such intimate Contact with the two surfaces with which it lies as to nake a. rust-proof joint, besides protecting the spindle, `facilitating drawing the hub from the spindle, and realizing other advan- 'die lannular groove l0 ot the upward extenV sionot the hub, sind with its screw` ll bearing upon the end ot' the spindle after the cap is removed. i

l clailn: j j i i l. In e centriligel machine, L vertical spindle ol" hard metal having en upwardly presented7 longitudinally tapered tree end, a packing sleeve oit' soft inet-(1l closely itting said tapered end and having e longitudinally tapered outer` surface, a basket having a metal hub bored to closely tit the pecking sleeve and establishing irctional driving connectionv through said packing sleeve with the spindle, and a` capoverlying the end ot the joint i'orn'ied by said pecking sleeve between said spindle and'hubfand having a depending Vflange surrounding the end of the hub.

2. in a centrifugal extractor, a. vertical spindle having a longitudinally tapered free upper end, :L baskethaving at the bottom thereof a hub constructed with a bore tapered substantially"parallel with the tapei" of the spindlebut of materially 4greater diameter, a paclnng slee'veot` soft nietal interosed between said sondle `and hub closel f iittingboth membersV and establishing trictional `drive between them, and a cap over lying `the end of thejoint'iornied by said Vpecking sleeve between said spindle and hub, and having a. depending flange sun rounding the end of the hub and depending thereon tothe upper water line of the basket.

Signed atChicago, Illinois, this 7th day of Sept.7 1920. 

